Air Brakes #1
Air Brakes Endorsement Test | Maine 2026 #1 Page 4 of 4
Train for FREE online with our Maine CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a ME Class A/Class B driver license in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.
25
20
20
19 . A low air pressure warning signal should activate:
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
20 . The air compressor is connected to the:
The air compressor of an air brake system is connected to the engine through gears or a v-belt. The compressor may be air-cooled or cooled by the engine cooling system.
21 . When parking, you should not use the parking brake if:
If your brakes are hot after coming down a steep grade, you should not use your parking brake when parking. Let your brakes cool before applying the parking brake or risk damaging the brakes.
22 . An application pressure gauge shows:
If a vehicle is equipped, an application pressure gauge shows how much air pressure is being applied to the brakes. This gauge can help a driver identify if their brakes are beginning to fade.
23 . What do the two systems of a dual air brake system share?
Both systems in a dual air brake systems share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.
24 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
A one-way check valve is required to be between an air compressor and the first main reservoir. This valve prevents air from escaping the system if the air compressor develops a leak.
25 . While driving, ____ generally holds spring brakes in place.
While driving, spring brakes are generally held in place by air pressure. If the air pressure gets low enough, the springs will activate the brakes.
2026 Maine | Frequently Asked Questions
In Maine, a CDL Class B license allows the holder to operate commercial vehicles weighing more than 26,000 pounds or towing a vehicle not exceeding 10,000 pounds. This includes buses, dump trucks, and straight trucks. The license also includes any vehicle included within Class C. However, to drive a combination vehicle, a Class A license is required.
A Class B CDL license in Maine allows the holder to operate single or combination vehicles where the single vehicle weighs over 26,000 pounds. This includes straight trucks, buses, segmented buses, dump trucks with small trailers, and trucks towing trailers not exceeding 10,000 pounds. However, a Class B license does not cover operation of Class A vehicles.
To acquire a Class B CDL license in Maine, you must be at least 18 years old (21 for interstate driving), possess a valid Maine driver's license, pass a vision test, and successfully complete a written knowledge test. Afterward, you'll need to pass a skills test which includes a pre-trip vehicle inspection, basic controls test, and on-road driving exam.
To qualify for a Class B CDL license in Maine, you must be at least 21 years old for interstate driving. However, if you plan to drive only within Maine (intrastate driving), you can apply for a Class B CDL license at the age of 18. Additionally, you must pass both a written knowledge test and a skills test.
While endorsements are not necessary to obtain a basic Class B CDL in Maine, they can broaden the range of vehicles you can operate. Endorsements include passenger (P), school bus (S), tank vehicle (N), and hazardous materials (H). Each endorsement requires passing additional written and/or skills tests.
The Class B CDL skills assessment in Maine includes a pre-trip vehicle inspection to ensure the vehicle is safe to drive, a basic controls test to evaluate your ability to control the vehicle, and an on-road driving test where you'll need to demonstrate proper driving techniques and safety measures.
Yes, Class B CDL license holders in Maine are restricted to operating vehicles under 26,001 pounds or towing vehicles that do not exceed 10,000 pounds. Additionally, unless they have specific endorsements, they cannot operate vehicles carrying hazardous materials, school buses, or passenger vehicles designed to carry 16 or more occupants.
In Maine, the Class B CDL written test is typically offered in English. However, accommodations for non-English speakers may be available in some cases. It's recommended to contact the Maine Bureau of Motor Vehicles directly to inquire about language options and any possible translation services.
Yes, you can request accommodations for the Class B CDL written exam in Maine if you have a disability. The Bureau of Motor Vehicles (BMV) provides reasonable testing accommodations according to the Americans with Disabilities Act (ADA). You'll need to provide documentation of your disability and specific accommodation needs to the BMV prior to scheduling your exam.
Yes, if you don't pass the Class B CDL written test in Maine, you can retake it. However, you must wait a minimum of one day before retesting. There may also be retesting fees you'll need to pay. It's recommended to study the Maine Commercial Driver Manual thoroughly before reattempting the test.